Oklahoma City Thunder stand one win from the Western Conference Finals after a resounding 131-108 triumph over the Los Angeles Lakers, seizing a 3-0 series advantage.

The Lakers confront an unprecedented challenge: becoming the first NBA team ever to erase a 3-0 deficit.

Shai Gilgeous-Alexander delivered 23 points and nine assists for the top-seeded Thunder, yet teammate Ajay Mitchell proved sharper, tallying 24 points and 10 assists.

LeBron James, the 41-year-old Lakers icon, managed 19 points, but his squad - sidelined by injuries including to key contributor Anthony Davis - faltered badly in this lopsided matchup.

As reigning NBA champions, the Thunder emerge as favorites to repeat. Gilgeous-Alexander notched his series-high scoring total despite a shaky start, missing nine of his initial 11 attempts. His playoff output trails his regular-season average of 31.1 points.

"Obviously, I haven't been my best in performances, but I think I've been able to help the team win and that's most important," said Gilgeous-Alexander.

"As long as we win. If the rest of the play-off run or the rest of my career look like what it looked like the past few games, I'd be OK with it because we won games."

In the East, Donovan Mitchell erupted for 35 points to steer the Cleveland Cavaliers past the Detroit Pistons 116-109.

The win at Rocket Mortgage FieldHouse proved crucial for the fourth-seeded Cavaliers, trimming the Pistons' series edge to 2-1.

Cleveland forged a 16-point halftime cushion, and though Detroit rallied behind Cade Cunningham's 27-point triple-double - with 10 rebounds and 10 assists - Mitchell's clutch free throws sealed the outcome.

The New York Knicks sit one victory from advancing following their 108-94 defeat of the Philadelphia 76ers on Friday, while the San Antonio Spurs hold a 2-1 edge over the Minnesota Timberwolves after a 115-108 decision.